VLTI | ESO

<!DOCTYPE html> <html lang="en"> <head prefix="og: http://ogp.me/ns# fb: http://ogp.me/ns/fb#"><script type="text/javascript" src="/_static/js/bundle-playback.js?v=HxkREWBo" charset="utf-8"></script> <script type="text/javascript" src="/_static/js/wombat.js?v=txqj7nKC" charset="utf-8"></script> <script>window.RufflePlayer=window.RufflePlayer||{};window.RufflePlayer.config={"autoplay":"on","unmuteOverlay":"hidden"};</script> <script type="text/javascript" src="/_static/js/ruffle/ruffle.js"></script> <script type="text/javascript"> __wm.init("https://web.archive.org/web"); __wm.wombat("https://www.eso.org/public/teles-instr/paranal-observatory/vlt/vlti/","20220310081311","https://web.archive.org/","web","/_static/", "1646899991"); </script> <link rel="stylesheet" type="text/css" href="/_static/css/banner-styles.css?v=S1zqJCYt" /> <link rel="stylesheet" type="text/css" href="/_static/css/iconochive.css?v=3PDvdIFv" />  <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <meta name="viewport" content="width=device-width, initial-scale=1"> <base target="_top"/> <meta name="robots" content="index,follow"/> <meta name="author" content="information@eso.org"/> <meta name="description" content="ESO, European Organisation for Astronomical Research in the Southern Hemisphere"/> <meta name="keywords" content="ESO, eso.org, Astronomy, Astrophysics, Astronomie, Suedsternwarte, telescopes, detectors, comets, planets, stars, galaxies, nebulae, universe, NTT, VLT, VLTI, ALMA, ELT, La Silla, Paranal, Garching, Chile"/> <meta name="statvooVerification" content="f546f5bccd3fb7f8c5d8e97c6beab814"/> <link rel="alternate" href="https://web.archive.org/web/20220310081311/https://www.eso.org/public/teles-instr/paranal-observatory/vlt/vlti/" hreflang="x-default"/><link rel="alternate" href="https://web.archive.org/web/20220310081311/https://www.eso.org/public/australia/teles-instr/paranal-observatory/vlt/vlti/" hreflang="en-au"/><link rel="alternate" href="https://web.archive.org/web/20220310081311/https://www.eso.org/public/unitedkingdom/teles-instr/paranal-observatory/vlt/vlti/" hreflang="en-gb"/><link rel="alternate" href="https://web.archive.org/web/20220310081311/https://www.eso.org/public/ireland/teles-instr/paranal-observatory/vlt/vlti/" hreflang="en-ie"/><link rel="alternate" href="https://web.archive.org/web/20220310081311/https://www.eso.org/public/usa/teles-instr/paranal-observatory/vlt/vlti/" hreflang="en-us"/><link rel="alternate" href="https://web.archive.org/web/20220310081311/https://www.eso.org/public/albania/teles-instr/paranal-observatory/vlt/vlti/" hreflang="sq"/><link rel="alternate" href="https://web.archive.org/web/20220310081311/https://www.eso.org/public/czechrepublic/teles-instr/paranal-observatory/vlt/vlti/" hreflang="cs"/><link rel="alternate" href="https://web.archive.org/web/20220310081311/https://www.eso.org/public/denmark/teles-instr/paranal-observatory/vlt/vlti/" hreflang="da"/><link rel="alternate" href="https://web.archive.org/web/20220310081311/https://www.eso.org/public/netherlands/teles-instr/paranal-observatory/vlt/vlti/" hreflang="nl"/><link rel="alternate" href="https://web.archive.org/web/20220310081311/https://www.eso.org/public/belgium-nl/teles-instr/paranal-observatory/vlt/vlti/" hreflang="nl-be"/><link rel="alternate" href="https://web.archive.org/web/20220310081311/https://www.eso.org/public/finland/teles-instr/paranal-observatory/vlt/vlti/" hreflang="fi"/><link rel="alternate" href="https://web.archive.org/web/20220310081311/https://www.eso.org/public/france/teles-instr/paranal-observatory/vlt/vlti/" hreflang="fr"/><link rel="alternate" href="https://web.archive.org/web/20220310081311/https://www.eso.org/public/belgium-fr/teles-instr/paranal-observatory/vlt/vlti/" hreflang="fr-be"/><link rel="alternate" href="https://web.archive.org/web/20220310081311/https://www.eso.org/public/switzerland-fr/teles-instr/paranal-observatory/vlt/vlti/" hreflang="fr-ch"/><link rel="alternate" href="https://web.archive.org/web/20220310081311/https://www.eso.org/public/germany/teles-instr/paranal-observatory/vlt/vlti/" hreflang="de"/><link rel="alternate" href="https://web.archive.org/web/20220310081311/https://www.eso.org/public/austria/teles-instr/paranal-observatory/vlt/vlti/" hreflang="de-at"/><link rel="alternate" href="https://web.archive.org/web/20220310081311/https://www.eso.org/public/belgium-de/teles-instr/paranal-observatory/vlt/vlti/" hreflang="de-be"/><link rel="alternate" href="https://web.archive.org/web/20220310081311/https://www.eso.org/public/switzerland-de/teles-instr/paranal-observatory/vlt/vlti/" hreflang="de-ch"/><link rel="alternate" href="https://web.archive.org/web/20220310081311/https://www.eso.org/public/greece/teles-instr/paranal-observatory/vlt/vlti/" hreflang="el"/><link rel="alternate" href="https://web.archive.org/web/20220310081311/https://www.eso.org/public/hungary/teles-instr/paranal-observatory/vlt/vlti/" hreflang="hu"/><link rel="alternate" href="https://web.archive.org/web/20220310081311/https://www.eso.org/public/iceland/teles-instr/paranal-observatory/vlt/vlti/" hreflang="is"/><link rel="alternate" href="https://web.archive.org/web/20220310081311/https://www.eso.org/public/italy/teles-instr/paranal-observatory/vlt/vlti/" hreflang="it"/><link rel="alternate" href="https://web.archive.org/web/20220310081311/https://www.eso.org/public/switzerland-it/teles-instr/paranal-observatory/vlt/vlti/" hreflang="it-ch"/><link rel="alternate" href="https://web.archive.org/web/20220310081311/https://www.eso.org/public/norway/teles-instr/paranal-observatory/vlt/vlti/" hreflang="nb"/><link rel="alternate" href="https://web.archive.org/web/20220310081311/https://www.eso.org/public/poland/teles-instr/paranal-observatory/vlt/vlti/" hreflang="pl"/><link rel="alternate" href="https://web.archive.org/web/20220310081311/https://www.eso.org/public/brazil/teles-instr/paranal-observatory/vlt/vlti/" hreflang="pt-br"/><link rel="alternate" href="https://web.archive.org/web/20220310081311/https://www.eso.org/public/portugal/teles-instr/paranal-observatory/vlt/vlti/" hreflang="pt"/><link rel="alternate" href="https://web.archive.org/web/20220310081311/https://www.eso.org/public/russia/teles-instr/paranal-observatory/vlt/vlti/" hreflang="ru"/><link rel="alternate" href="https://web.archive.org/web/20220310081311/https://www.eso.org/public/spain/teles-instr/paranal-observatory/vlt/vlti/" hreflang="es"/><link rel="alternate" href="https://web.archive.org/web/20220310081311/https://www.eso.org/public/chile/teles-instr/paranal-observatory/vlt/vlti/" hreflang="es-cl"/><link rel="alternate" href="https://web.archive.org/web/20220310081311/https://www.eso.org/public/serbia/teles-instr/paranal-observatory/vlt/vlti/" hreflang="sr-latn"/><link rel="alternate" href="https://web.archive.org/web/20220310081311/https://www.eso.org/public/sweden/teles-instr/paranal-observatory/vlt/vlti/" hreflang="sv"/><link rel="alternate" href="https://web.archive.org/web/20220310081311/https://www.eso.org/public/turkey/teles-instr/paranal-observatory/vlt/vlti/" hreflang="tr"/><link rel="alternate" href="https://web.archive.org/web/20220310081311/https://www.eso.org/public/ukraine/teles-instr/paranal-observatory/vlt/vlti/" hreflang="uk"/> <link rel="shortcut icon" href="https://web.archive.org/web/20220310081311im_/https://www.eso.org/public/archives/favicon.ico"/> <title>VLTI | ESO</title>  <style type="text/css"> @import url("https://web.archive.org/web/20220310081311cs_/https://fast.fonts.net/t/1.css?apiType=css&projectid=03892b9b-79f6-4f01-9746-af912ebf5e47"); </style> <link href="/web/20220310081311cs_/https://www.eso.org/public/archives/djp/css/main.36985f868815.css" rel="stylesheet" type="text/css"/> <link href="https://web.archive.org/web/20220310081311/http://feeds.feedburner.com/EsoTopNews" rel="alternate" type="application/rss+xml" title="ESO Top News"/> <link href="https://web.archive.org/web/20220310081311/http://feeds.feedburner.com/EsoAnnouncements" rel="alternate" type="application/rss+xml" title="ESO Announcements"/> <link href="https://web.archive.org/web/20220310081311/http://feeds.feedburner.com/ESOcast" rel="alternate" type="application/rss+xml" title="ESOCast"/> <link href="https://web.archive.org/web/20220310081311/https://recruitment.eso.org/jobs.rss" rel="alternate" type="application/rss+xml" title="Jobs@ESO"/> <link href="https://web.archive.org/web/20220310081311/https://www.eso.org/public/blog/feed/" rel="alternate" type="application/rss+xml" title="ESOblog"/>  <meta name="twitter:card" content="summary"/> <meta name="twitter:site" content="@ESO"/> <meta name="twitter:creator" content="@ESO"/>  <script type="text/javascript"> var _paq = window._paq || []; /* tracker methods like "setCustomDimension" should be called before "trackPageView" */ _paq.push(['trackPageView']); _paq.push(['enableLinkTracking']); (function() { var u="/mtmo/"; _paq.push(['setTrackerUrl', u+'matomo.php']); _paq.push(['setSiteId', '1']); var d=document, g=d.createElement('script'), s=d.getElementsByTagName('script')[0]; g.type='text/javascript'; g.async=true; g.defer=true; g.src=u+'matomo.js'; s.parentNode.insertBefore(g,s); })(); </script>  <meta property="og:title" content="VLTI"/> </head> <body> <input type="hidden" name="csrfmiddlewaretoken" value="WFZQBfTLouxJ17wBvYoYjQteSlEnoiY9WrmUHRyA9oVJDrgYxn27tCQKHQf92OQ4"/> <div id="privacy-notice" style="display: none"> <p> By continuing to use this website, you are giving consent to our use of cookies.<br> For more information on how ESO uses data and how you can disable cookies, please view <a href="/web/20220310081311/https://www.eso.org/public/about-eso/privacy/"> our privacy policy</a>. </p> <button type="button" class="btn btn-primary" onclick="accept_privacy_notice()"> Accept </button> <script> // Display the privacy cookie if the cookie is not set if (!has_privacy_cookie()) { document.getElementById('privacy-notice').style.display = 'block' } function has_privacy_cookie() { return document.cookie.split(';').filter(function(item) { return item.indexOf('privacy_notice_accepted=True') >= 0 }).length > 0 } function accept_privacy_notice() { let data = { LANGUAGE_CODE: 'en' } let csrftoken = getCookie('csrftoken'); let headers = new Headers(); headers.append('Content-Type', 'application/json; charset=utf-8'); headers.append('X-CSRFToken', csrftoken); fetch('/public/accept-privacy-notice/', { method: 'post', headers: headers, credentials: 'include', body: JSON.stringify(data) }).then( document.getElementById('privacy-notice').style.display = 'none' ) } function getCookie(name) { var cookieValue = null; if (document.cookie && document.cookie !== '') { var cookies = document.cookie.split(';'); for (var i = 0; i < cookies.length; i++) { var cookie = jQuery.trim(cookies[i]); // Does this cookie string begin with the name we want? if (cookie.substring(0, name.length + 1) == (name + '=')) { cookieValue = decodeURIComponent(cookie.substring(name.length + 1)); break; } } } return cookieValue; } </script> </div> <nav class="navbar-general-wrapper" role="navigation"> <div class="navbar-general"> <div class="minilogo"> <a href="/web/20220310081311/https://www.eso.org/public/"> <div class="sprites-esologo-23-30" title="European Organisation for Astronomical Research in the Southern Hemisphere"></div> </a> </div> <div id="select-language"> <div class="flags"> <div title="Austria" class="sprites-flag_at"></div> <div title="Belgium" class="sprites-flag_be"></div> <div title="Czech Republic" class="sprites-flag_cz"></div> <div title="Denmark" class="sprites-flag_da"></div> <div title="Finland" class="sprites-flag_fi"></div> <div title="France" class="sprites-flag_fr"></div> <div title="Germany" class="sprites-flag_de"></div> <div title="Ireland" class="sprites-flag_ie"></div> <div title="Italy" class="sprites-flag_it"></div> <div title="Netherlands" class="sprites-flag_nl"></div> <div title="Poland" class="sprites-flag_pl"></div> <div title="Portugal" class="sprites-flag_pt"></div> <div title="Spain" class="sprites-flag_es"></div> <div title="Sweden" class="sprites-flag_sv"></div> <div title="Switzerland" class="sprites-flag_ch"></div> <div title="UK" class="sprites-flag_gb"></div> <div style="margin-left: 8px" title="Chile" class="sprites-flag_cl"></div> </div> <div class="languages"> <div class="language-button"> <span class="language-text">Select Language (en)</span> <div class="language-flag"><div title="en" class="flag sprites-flag_gb"> </div><span> (en)</span></div> <span class="caret"></span> </div> <ul class="languages-dropdown" role="menu"> <li class="language selected"><a role="menuitem" href="/web/20220310081311/https://www.eso.org/public/teles-instr/paranal-observatory/vlt/vlti/?lang"><div title="International English" class="flag sprites-flag_en"> </div>International English</a></li> <li class="language"><a role="menuitem" href="/web/20220310081311/https://www.eso.org/public/denmark/teles-instr/paranal-observatory/vlt/vlti/?lang"><div title="Dansk" class="flag sprites-flag_da"> </div>Dansk</a></li> <li class="language"><a role="menuitem" href="/web/20220310081311/https://www.eso.org/public/germany/teles-instr/paranal-observatory/vlt/vlti/?lang"><div title="Deutsch" class="flag sprites-flag_de"> </div>Deutsch</a></li> <li class="language"><a role="menuitem" href="/web/20220310081311/https://www.eso.org/public/belgium-de/teles-instr/paranal-observatory/vlt/vlti/?lang"><div title="Deutsch (Belgien)" class="flag sprites-flag_be"> </div>Deutsch (Belgien)</a></li> <li class="language"><a role="menuitem" href="/web/20220310081311/https://www.eso.org/public/switzerland-de/teles-instr/paranal-observatory/vlt/vlti/?lang"><div title="Deutsch (Schweiz)" class="flag sprites-flag_ch"> </div>Deutsch (Schweiz)</a></li> <li class="language"><a role="menuitem" href="/web/20220310081311/https://www.eso.org/public/austria/teles-instr/paranal-observatory/vlt/vlti/?lang"><div title="Deutsch (Österreich)" class="flag sprites-flag_at"> </div>Deutsch (Österreich)</a></li> <li class="language"><a role="menuitem" href="/web/20220310081311/https://www.eso.org/public/australia/teles-instr/paranal-observatory/vlt/vlti/?lang"><div title="English (Australia)" class="flag sprites-flag_au"> </div>English (Australia)</a></li> <li class="language"><a role="menuitem" href="/web/20220310081311/https://www.eso.org/public/ireland/teles-instr/paranal-observatory/vlt/vlti/?lang"><div title="English (Ireland)" class="flag sprites-flag_ie"> </div>English (Ireland)</a></li> <li class="language"><a role="menuitem" href="/web/20220310081311/https://www.eso.org/public/unitedkingdom/teles-instr/paranal-observatory/vlt/vlti/?lang"><div title="English (UK)" class="flag sprites-flag_gb"> </div>English (UK)</a></li> <li class="language"><a role="menuitem" href="/web/20220310081311/https://www.eso.org/public/usa/teles-instr/paranal-observatory/vlt/vlti/?lang"><div title="English (USA)" class="flag sprites-flag_us"> </div>English (USA)</a></li> <li class="language"><a role="menuitem" href="/web/20220310081311/https://www.eso.org/public/spain/teles-instr/paranal-observatory/vlt/vlti/?lang"><div title="Español" class="flag sprites-flag_es"> </div>Español</a></li> <li class="language"><a role="menuitem" href="/web/20220310081311/https://www.eso.org/public/chile/teles-instr/paranal-observatory/vlt/vlti/?lang"><div title="Español (Chile)" class="flag sprites-flag_cl"> </div>Español (Chile)</a></li> <li class="language"><a role="menuitem" href="/web/20220310081311/https://www.eso.org/public/france/teles-instr/paranal-observatory/vlt/vlti/?lang"><div title="Français" class="flag sprites-flag_fr"> </div>Français</a></li> <li class="language"><a role="menuitem" href="/web/20220310081311/https://www.eso.org/public/belgium-fr/teles-instr/paranal-observatory/vlt/vlti/?lang"><div title="Français (Belgique)" class="flag sprites-flag_be"> </div>Français (Belgique)</a></li> <li class="language"><a role="menuitem" href="/web/20220310081311/https://www.eso.org/public/switzerland-fr/teles-instr/paranal-observatory/vlt/vlti/?lang"><div title="Français (Suisse)" class="flag sprites-flag_ch"> </div>Français (Suisse)</a></li> <li class="language"><a role="menuitem" href="/web/20220310081311/https://www.eso.org/public/italy/teles-instr/paranal-observatory/vlt/vlti/?lang"><div title="Italiano" class="flag sprites-flag_it"> </div>Italiano</a></li> <li class="language"><a role="menuitem" href="/web/20220310081311/https://www.eso.org/public/switzerland-it/teles-instr/paranal-observatory/vlt/vlti/?lang"><div title="Italiano (Svizzera)" class="flag sprites-flag_ch"> </div>Italiano (Svizzera)</a></li> <li class="language"><a role="menuitem" href="/web/20220310081311/https://www.eso.org/public/hungary/teles-instr/paranal-observatory/vlt/vlti/?lang"><div title="Magyarország" class="flag sprites-flag_hu"> </div>Magyarország</a></li> <li class="language"><a role="menuitem" href="/web/20220310081311/https://www.eso.org/public/netherlands/teles-instr/paranal-observatory/vlt/vlti/?lang"><div title="Nederlands" class="flag sprites-flag_nl"> </div>Nederlands</a></li> <li class="language"><a role="menuitem" href="/web/20220310081311/https://www.eso.org/public/belgium-nl/teles-instr/paranal-observatory/vlt/vlti/?lang"><div title="Nederlands (België)" class="flag sprites-flag_be"> </div>Nederlands (België)</a></li> <li class="language"><a role="menuitem" href="/web/20220310081311/https://www.eso.org/public/norway/teles-instr/paranal-observatory/vlt/vlti/?lang"><div title="Norsk" class="flag sprites-flag_nb"> </div>Norsk</a></li> <li class="language"><a role="menuitem" href="/web/20220310081311/https://www.eso.org/public/poland/teles-instr/paranal-observatory/vlt/vlti/?lang"><div title="Polski" class="flag sprites-flag_pl"> </div>Polski</a></li> <li class="language"><a role="menuitem" href="/web/20220310081311/https://www.eso.org/public/portugal/teles-instr/paranal-observatory/vlt/vlti/?lang"><div title="Português" class="flag sprites-flag_pt"> </div>Português</a></li> <li class="language"><a role="menuitem" href="/web/20220310081311/https://www.eso.org/public/brazil/teles-instr/paranal-observatory/vlt/vlti/?lang"><div title="Português (Brasil)" class="flag sprites-flag_br"> </div>Português (Brasil)</a></li> <li class="language"><a role="menuitem" href="/web/20220310081311/https://www.eso.org/public/albania/teles-instr/paranal-observatory/vlt/vlti/?lang"><div title="Shqip" class="flag sprites-flag_sq"> </div>Shqip</a></li> <li class="language"><a role="menuitem" href="/web/20220310081311/https://www.eso.org/public/serbia/teles-instr/paranal-observatory/vlt/vlti/?lang"><div title="Srpski" class="flag sprites-flag_sr-latn"> </div>Srpski</a></li> <li class="language"><a role="menuitem" href="/web/20220310081311/https://www.eso.org/public/finland/teles-instr/paranal-observatory/vlt/vlti/?lang"><div title="Suomi" class="flag sprites-flag_fi"> </div>Suomi</a></li> <li class="language"><a role="menuitem" href="/web/20220310081311/https://www.eso.org/public/sweden/teles-instr/paranal-observatory/vlt/vlti/?lang"><div title="Svenska" class="flag sprites-flag_sv"> </div>Svenska</a></li> <li class="language"><a role="menuitem" href="/web/20220310081311/https://www.eso.org/public/turkey/teles-instr/paranal-observatory/vlt/vlti/?lang"><div title="Türkçe" class="flag sprites-flag_tr"> </div>Türkçe</a></li> <li class="language"><a role="menuitem" href="/web/20220310081311/https://www.eso.org/public/iceland/teles-instr/paranal-observatory/vlt/vlti/?lang"><div title="Íslenska" class="flag sprites-flag_is"> </div>Íslenska</a></li> <li class="language"><a role="menuitem" href="/web/20220310081311/https://www.eso.org/public/czechrepublic/teles-instr/paranal-observatory/vlt/vlti/?lang"><div title="Česky" class="flag sprites-flag_cs"> </div>Česky</a></li> <li class="language"><a role="menuitem" href="/web/20220310081311/https://www.eso.org/public/russia/teles-instr/paranal-observatory/vlt/vlti/?lang"><div title="Русский" class="flag sprites-flag_ru"> </div>Русский</a></li> <li class="language"><a role="menuitem" href="/web/20220310081311/https://www.eso.org/public/ukraine/teles-instr/paranal-observatory/vlt/vlti/?lang"><div title="українська" class="flag sprites-flag_uk"> </div>українська</a></li> </ul> </div> </div> <div class="sections"> <a href="https://web.archive.org/web/20220310081311/https://www.eso.org/sci.html">Science</a> <a href="/web/20220310081311/https://www.eso.org/UserPortal/">User Portal</a> </div> <div class="searchbox"> <button type="button" class="btn btn-default" id="searchbox-button"> <span class="fa fa-search"></span> </button> <div id="searchbox-dropdown"> <form action="/web/20220310081311/https://www.eso.org/public/search/" method="get" class="form-inline" role="search"> <div class="form-group"> <div class="input-group"> <input type="text" value="" placeholder="Search..." name="q" class="form-control"> <span class="input-group-btn"> <button class="btn btn-default" type="submit"><span class="fa fa-search"></span></button> </span> </div>   </div> </form> </div> </div> <div class="links"> <a href="/web/20220310081311/https://www.eso.org/public/outreach/newsletters/esonews/">Subscribe</a> <a href="/web/20220310081311/https://www.eso.org/public/about-eso/travel/">Contact</a> <a href="/web/20220310081311/https://www.eso.org/public/sitemap/">Site Map</a> </div> </div> </nav> <nav class="main-menu-wrapper" role="navigation"> <div class="main-menu"> <div class="mobile-menu clearfix"> <button class="menu-trigger"><span class="fa fa-navicon"></span> Open Menu</button> </div> <ul class="level0 mainmenu-aim"> <li><a href="/web/20220310081311/https://www.eso.org/public/about-eso/">About<span class="fa fa-angle-down level0-children-arrows"></span></a> <span class="mobile-children"> <span class="fa fa-angle-down"></span> </span> <div class="level1-wrapper"> <div class="level1"> <ul id="submenu-aim-2" class="submenu-aim"> <li class=""><a href="/web/20220310081311/https://www.eso.org/public/about-eso/esoglance/"> ESO, the European Southern Observatory </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/about-eso/organisation/"> Organisation </a></li><li class="submenu"><a href="/web/20220310081311/https://www.eso.org/public/about-eso/dg-office/"> Director General <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-5" class="submenu-aim sublevel"><li class="submenu"><a href="/web/20220310081311/https://www.eso.org/public/about-eso/dg-office/previous-dg/"> List of Directors General <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-6" class="submenu-aim sublevel"><li class=""><a href="/web/20220310081311/https://www.eso.org/public/about-eso/dg-office/xbarcons/"> Prof. Xavier Barcons </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/about-eso/dg-office/tdezeeuw/"> Prof. T. de Zeeuw </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/about-eso/dg-office/ccesarsk/"> Dr. C. Cesarsky </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/about-eso/dg-office/rgiacconi/"> Prof. R. Giacconi </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/about-eso/dg-office/hvanderlaan/"> Prof. H. van der Laan </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/about-eso/dg-office/lwoltjer/"> Prof. L. Woltjer </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/about-eso/dg-office/ablaauw/"> Prof. A. Blaauw </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/about-eso/dg-office/otto-heckmann/"> Prof. O. Heckmann </a></li></ul></li></ul></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/about-eso/committees.html"> ESO's Governing Bodies </a></li><li class="submenu"><a href="/web/20220310081311/https://www.eso.org/public/about-eso/memberstates/"> Member States <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-16" class="submenu-aim sublevel"><li class=""><a href="/web/20220310081311/https://www.eso.org/public/about-eso/memberstates/austrianinvolvement/"> Austria </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/about-eso/memberstates/belgianinvolvement/"> Belgium </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/about-eso/memberstates/czechinvolvement/"> Czech Republic </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/about-eso/memberstates/danishinvolvement/"> Denmark </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/about-eso/memberstates/finnishinvolvement/"> Finland </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/about-eso/memberstates/frenchinvolvement/"> France </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/about-eso/memberstates/germaninvolvement/"> Germany </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/about-eso/memberstates/irishinvolvement/"> Ireland </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/about-eso/memberstates/italianinvolvement/"> Italy </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/about-eso/memberstates/dutchinvolvement/"> Netherlands </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/about-eso/memberstates/polishinvolvement/"> Poland </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/about-eso/memberstates/portugueseinvolvement/"> Portugal </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/about-eso/memberstates/spanishinvolvement/"> Spain </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/about-eso/memberstates/swedishinvolvement/"> Sweden </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/about-eso/memberstates/swissinvolvement/"> Switzerland </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/about-eso/memberstates/britishinvolvement/"> United Kingdom </a></li></ul></li><li class="submenu"><a href="/web/20220310081311/https://www.eso.org/public/about-eso/travel/"> Travel and Contacts <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-33" class="submenu-aim sublevel"><li class=""><a href="/web/20220310081311/https://www.eso.org/public/about-eso/travel/garching/"> Travel to ESO Headquarters </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/about-eso/travel/vitacura/"> Travel to Vitacura Office </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/about-eso/travel/guesthouse/"> Travel to Guesthouse </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/about-eso/travel/lasilla/"> Travel to La Silla </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/about-eso/travel/laserena/"> Travel to La Serena </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/about-eso/travel/paranal/"> Travel to Paranal </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/about-eso/travel/antofagasta/"> Travel to Antofagasta </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/about-eso/travel/apexsequitor/"> Travel to APEX/Sequitor </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/about-eso/travel/chajnantor/"> Travel to Chajnantor </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/about-eso/travel/elt/"> Travel to ELT Armazones </a></li></ul></li><li class="submenu"><a href="/web/20220310081311/https://www.eso.org/public/about-eso/visitors/"> Visits to ESO Sites <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-44" class="submenu-aim sublevel"><li class=""><a href="/web/20220310081311/https://www.eso.org/public/about-eso/visitors/paranal/"> Weekend visits to Paranal </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/about-eso/visitors/lasilla/"> Weekend Visits to La Silla </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/about-eso/visitors/alma/"> Public Visits to the ALMA OSF </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/outreach/pressmedia/mediavisits/"> Media Visits </a></li></ul></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/about-eso/societal-benefits/"> ESO and Society </a></li><li class="submenu"><a href="/web/20220310081311/https://www.eso.org/public/about-eso/eso-and-chile/"> ESO & Chile <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-50" class="submenu-aim sublevel"><li class=""><a href="/web/20220310081311/https://www.eso.org/public/about-eso/eso-and-chile/representation-office-chile/"> ESO Representation Office in Chile </a></li></ul></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/about-eso/architecture/"> Architecture at ESO </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/about-eso/collaborations/"> Collaborations with ESO </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/about-eso/acronyms/"> ESO Acronyms </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/about-eso/timeline/"> Timeline </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/about-eso/green/"> Environmental sustainability at ESO </a></li><li class="submenu"><a href="/web/20220310081311/https://www.eso.org/public/about-eso/faq/"> Frequently Asked Questions <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-57" class="submenu-aim sublevel"><li class=""><a href="/web/20220310081311/https://www.eso.org/public/about-eso/faq/faq-eso/"> ESO </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/about-eso/faq/faq-vlt-paranal/"> VLT/Paranal </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/about-eso/faq/faq-apex-alma/"> APEX/ALMA </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/about-eso/faq/faq-survey-telescopes/"> Survey Telescopes </a></li><li class=""><a href="https://web.archive.org/web/20220310081311/https://elt.eso.org/about/faq/"> ELT </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/about-eso/faq/privileges_and_immunities/"> Privileges and Immunities </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/about-eso/faq/faq-eso-australia/"> ESO & Australia </a></li></ul></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/about-eso/dark-skies-preservation/"> Dark skies preservation </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/about-eso/privacy/"> Terms and Conditions </a></li> </ul> </div> </div> </li> <li><a href="/web/20220310081311/https://www.eso.org/public/images/">Images<span class="fa fa-angle-down level0-children-arrows"></span></a> <span class="mobile-children"> <span class="fa fa-angle-down"></span> </span> <div class="level1-wrapper"> <div class="level1"> <ul id="submenu-aim-67" class="submenu-aim"> <li class=""><a href="/web/20220310081311/https://www.eso.org/public/images/search/"> Advanced Search </a></li><li class="submenu"><a class="no-link children" href="#"> Categories <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-69" class="submenu-aim sublevel"><li class=""><a href="/web/20220310081311/https://www.eso.org/public/images/archive/category/360pano/ "> 360 Panorama </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/images/archive/category/alma/"> ALMA </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/images/archive/category/apex/"> APEX </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/images/archive/category/chile/"> Chile </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/images/archive/category/cosmology/"> Cosmology </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/images/archive/category/elt/"> ELT </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/images/archive/category/eso-supernova/"> ESO Supernova </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/images/archive/category/exoplanets/"> Exoplanets </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/images/archive/category/fulldome/"> Fulldome </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/images/archive/category/galaxies/"> Galaxies </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/images/archive/category/galaxyclusters/"> Galaxy Clusters </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/images/archive/category/illustrations/"> Illustrations </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/images/archive/category/lasilla/"> La Silla </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/images/archive/category/nebulae/"> Nebulae </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/images/archive/category/paranal/"> Paranal </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/images/archive/category/peopleandevents/"> People and Events </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/images/archive/category/premises/"> Premises </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/images/archive/category/blackholes/"> Quasars and Black Holes </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/images/archive/category/solarsystem/"> Solar System </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/images/archive/category/starclusters/"> Star Clusters </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/images/archive/category/stars/"> Stars </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/images/archive/category/surveytelescopes/"> Survey Telescopes </a></li></ul></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/images/comparisons/"> Image Comparisons </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/images/imageformats/"> Image Formats </a></li><li class="submenu"><a href="/web/20220310081311/https://www.eso.org/public/images/potw/"> Picture of the Week <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-94" class="submenu-aim sublevel"><li class=""><a href="/web/20220310081311/https://www.eso.org/public/images/potw/archive/year/2022/"> 2022 </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/images/potw/archive/year/2021/"> 2021 </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/images/potw/archive/year/2020/"> 2020 </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/images/potw/archive/year/2019/"> 2019 </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/images/potw/archive/year/2018/"> 2018 </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/images/potw/archive/year/2017/"> 2017 </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/images/potw/archive/year/2016/"> 2016 </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/images/potw/archive/year/2015/"> 2015 </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/images/potw/archive/year/2014/"> 2014 </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/images/potw/archive/year/2013/"> 2013 </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/images/potw/archive/year/2012/"> 2012 </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/images/potw/archive/year/2011/"> 2011 </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/images/potw/archive/year/2010/"> 2010 </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/images/potw/archive/year/2009/"> 2009 </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/images/potw/archive/year/2008/"> 2008 </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/images/potw/archive/year/2007/"> 2007 </a></li></ul></li><li class="submenu"><a href="/web/20220310081311/https://www.eso.org/public/images/archive/top100/"> Top 100 <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-111" class="submenu-aim sublevel"><li class=""><a href="https://web.archive.org/web/20220310081311/https://cdn.eso.org/images/top100-large.zip"> Large JPG Zip File (3.5 GB) </a></li><li class=""><a href="https://web.archive.org/web/20220310081311/https://cdn.eso.org/images/top100-original.zip"> Original TIF Zip File (50 GB) </a></li></ul></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/copyright/"> Usage of ESO Images and Videos </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/images/archive/wallpapers/"> Wallpapers </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/images/archive/zoomable/"> Zoomable </a></li> </ul> </div> </div> </li> <li><a href="/web/20220310081311/https://www.eso.org/public/videos/">Videos<span class="fa fa-angle-down level0-children-arrows"></span></a> <span class="mobile-children"> <span class="fa fa-angle-down"></span> </span> <div class="level1-wrapper"> <div class="level1"> <ul id="submenu-aim-117" class="submenu-aim"> <li class=""><a href="/web/20220310081311/https://www.eso.org/public/videos/search/"> Advanced Search </a></li><li class="submenu"><a class="no-link children" href="#"> Categories <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-119" class="submenu-aim sublevel"><li class=""><a href="/web/20220310081311/https://www.eso.org/public/videos/archive/category/abouteso/"> About ESO </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/videos/archive/category/alma/"> ALMA </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/videos/archive/category/apex/"> APEX </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/videos/archive/category/compilations/"> Compilations </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/videos/archive/category/cosmology/"> Cosmology </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/videos/archive/category/elt/"> ELT </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/videos/archive/category/esocast/"> ESOcast </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/videos/archive/category/events/"> Events </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/videos/archive/category/exoplanets/"> Exoplanets </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/videos/archive/category/featuremovies/"> Feature Movies </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/videos/archive/category/fulldome/"> Fulldome </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/videos/archive/category/galaxies/"> Galaxies </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/videos/archive/category/galaxyclusters/"> Galaxy Clusters </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/videos/archive/category/lasilla/"> La Silla </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/videos/archive/category/nebulae/"> Nebulae </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/videos/archive/category/paranal/"> Paranal </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/videos/archive/category/premises/"> Premises </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/videos/archive/category/blackholes/"> Quasars and Black Holes </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/videos/archive/category/solarsystem/"> Solar System </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/videos/archive/category/starclusters/"> Star Clusters </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/videos/archive/category/stars/"> Stars </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/videos/archive/category/vnr/"> Video News Releases </a></li></ul></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/copyright/"> Usage of ESO Videos and Images </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/videoformats/"> Video Formats </a></li> </ul> </div> </div> </li> <li><a href="/web/20220310081311/https://www.eso.org/public/news/">News<span class="fa fa-angle-down level0-children-arrows"></span></a> <span class="mobile-children"> <span class="fa fa-angle-down"></span> </span> <div class="level1-wrapper"> <div class="level1"> <ul id="submenu-aim-144" class="submenu-aim"> <li class="submenu"><a href="/web/20220310081311/https://www.eso.org/public/news/"> Press Releases <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-145" class="submenu-aim sublevel"><li class="submenu"><a class="no-link children" href="#"> 2021-2030 <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-146" class="submenu-aim sublevel"><li class=""><a href="/web/20220310081311/https://www.eso.org/public/news/archive/year/2022/"> 2022 </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/news/archive/year/2021/"> 2021 </a></li></ul></li><li class="submenu"><a class="no-link children" href="#"> 2011–2020 <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-149" class="submenu-aim sublevel"><li class=""><a href="/web/20220310081311/https://www.eso.org/public/news/archive/year/2020/"> 2020 </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/news/archive/year/2019/"> 2019 </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/news/archive/year/2018/"> 2018 </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/news/archive/year/2017/"> 2017 </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/news/archive/year/2016/"> 2016 </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/news/archive/year/2015/"> 2015 </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/news/archive/year/2014/"> 2014 </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/news/archive/year/2013/"> 2013 </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/news/archive/year/2012/"> 2012 </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/news/archive/year/2011/"> 2011 </a></li></ul></li><li class="submenu"><a class="no-link children" href="#"> 2001–2010 <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-160" class="submenu-aim sublevel"><li class=""><a href="/web/20220310081311/https://www.eso.org/public/news/archive/year/2010/"> 2010 </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/news/archive/year/2009/"> 2009 </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/news/archive/year/2008/"> 2008 </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/news/archive/year/2007/"> 2007 </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/news/archive/year/2006/"> 2006 </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/news/archive/year/2005/"> 2005 </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/news/archive/year/2004/"> 2004 </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/news/archive/year/2003/"> 2003 </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/news/archive/year/2002/"> 2002 </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/news/archive/year/2001/"> 2001 </a></li></ul></li><li class="submenu"><a class="no-link children" href="#"> 1991–2000 <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-171" class="submenu-aim sublevel"><li class=""><a href="/web/20220310081311/https://www.eso.org/public/news/archive/year/2000/"> 2000 </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/news/archive/year/1999/"> 1999 </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/news/archive/year/1998/"> 1998 </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/news/archive/year/1997/"> 1997 </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/news/archive/year/1996/"> 1996 </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/news/archive/year/1995/"> 1995 </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/news/archive/year/1994/"> 1994 </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/news/archive/year/1993/"> 1993 </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/news/archive/year/1992/"> 1992 </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/news/archive/year/1991/"> 1991 </a></li></ul></li><li class="submenu"><a class="no-link children" href="#"> 1985–1990 <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-182" class="submenu-aim sublevel"><li class=""><a href="/web/20220310081311/https://www.eso.org/public/news/archive/year/1990/"> 1990 </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/news/archive/year/1989/"> 1989 </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/news/archive/year/1988/"> 1988 </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/news/archive/year/1987/"> 1987 </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/news/archive/year/1986/"> 1986 </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/news/archive/year/1985/"> 1985 </a></li></ul></li></ul></li><li class="submenu"><a href="/web/20220310081311/https://www.eso.org/public/announcements/"> Announcements <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-189" class="submenu-aim sublevel"><li class=""><a href="/web/20220310081311/https://www.eso.org/public/announcements/archive/year/2022/"> 2022 </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/announcements/archive/year/2021/"> 2021 </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/announcements/archive/year/2020/"> 2020 </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/announcements/archive/year/2019/"> 2019 </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/announcements/archive/year/2018/"> 2018 </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/announcements/archive/year/2017/"> 2017 </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/announcements/archive/year/2016/"> 2016 </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/announcements/archive/year/2015/"> 2015 </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/announcements/archive/year/2014/"> 2014 </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/announcements/archive/year/2013/"> 2013 </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/announcements/archive/year/2012/"> 2012 </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/announcements/archive/year/2011/"> 2011 </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/announcements/archive/year/2010/"> 2010 </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/announcements/archive/year/2009/"> 2009 </a></li></ul></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/news/starsateso/"> Stars@ESO </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/announcements/webupdates/"> New on eso.org </a></li><li class="submenu"><a href="/web/20220310081311/https://www.eso.org/public/outreach/pressmedia/"> Press Room <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-206" class="submenu-aim sublevel"><li class=""><a href="/web/20220310081311/https://www.eso.org/public/outreach/broadcast/"> Broadcast Services </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/outreach/pressmedia/mediavisits/"> Media Visits </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/copyright/"> Copyright Notice </a></li></ul></li><li class="submenu"><a href="/web/20220310081311/https://www.eso.org/public/newsletters/"> ESO Newsletters <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-210" class="submenu-aim sublevel"><li class=""><a href="/web/20220310081311/https://www.eso.org/public/newsletters/esonews/"> ESO News </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/newsletters/outreach/"> ESO Outreach Community Newsletter </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/sci/publications/newsletter/"> ESO Science Newsletter </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/outreach/newsletters/#2"> ESO Media Newsletter </a></li></ul></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/outreach/presscoverage/"> Press Coverage </a></li> </ul> </div> </div> </li> <li><a href="/web/20220310081311/https://www.eso.org/public/shop/">ESOshop<span class="fa fa-angle-down level0-children-arrows"></span></a> <span class="mobile-children"> <span class="fa fa-angle-down"></span> </span> <div class="level1-wrapper"> <div class="level1"> <ul id="submenu-aim-216" class="submenu-aim"> <li class="submenu"><a href="/web/20220310081311/https://www.eso.org/public/shop/category/"> Shop Products <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-217" class="submenu-aim sublevel"><li class=""><a href="/web/20220310081311/https://www.eso.org/public/shop/category/annualreport/"> Annual Reports </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/shop/category/apparel/"> Apparel </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/shop/category/book/"> Books </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/shop/category/brochure/"> Brochures </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/shop/category/calendar/"> Calendars </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/shop/category/capjournal/"> CAPjournals </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/shop/category/conferenceitem/"> Conferences </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/shop/category/donation/"> Donations </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/shop/category/media/"> DVDs/Bluray/CDs </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/shop/category/educationalmaterial/"> Educational Material </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/shop/category/supernovaactivity/"> ESO Supernova Activities </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/shop/category/flyer/"> Flyers </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/shop/category/handout/"> Handouts </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/shop/category/map/"> Maps </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/shop/category/merchandise/"> Merchandise </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/shop/category/messenger/"> Messengers </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/shop/category/mountedimage/"> Mounted Images </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/shop/category/postcard/"> Postcards </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/shop/category/printedposter/"> Posters </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/shop/category/technicaldocument/"> Reports </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/shop/category/sticker/"> Stickers </a></li></ul></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/shop/cart/"> View shopping cart </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/shop/checkout/"> Checkout </a></li><li class="submenu"><a href="/web/20220310081311/https://www.eso.org/public/shopinfo/"> Information <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-241" class="submenu-aim sublevel"><li class=""><a href="/web/20220310081311/https://www.eso.org/public/shopinfo/bulk_orders/"> Bulk Orders </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/shopinfo/"> Purchasing Steps </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/shopinfo/payment/"> Payment </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/shopinfo/shipping/"> Shipping </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/shopinfo/shopstaff/"> Staff Shopping </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/shopinfo/terms/"> Terms & Conditions </a></li></ul></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/shop/freeorder/"> Free Orders for Educators and Media </a></li> </ul> </div> </div> </li> <li class="current"><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/">Telescopes & Instruments<span class="fa fa-angle-down level0-children-arrows"></span></a> <span class="mobile-children"> <span class="fa fa-angle-down"></span> </span> <div class="level1-wrapper"> <div class="level1 current"> <ul id="submenu-aim-249" class="submenu-aim selected current"> <li class="submenu current"><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/paranal-observatory/"> Paranal Observatory <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-250" class="submenu-aim sublevel selected current"><li class="submenu current"><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/paranal-observatory/vlt/"> Very Large Telescope <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-251" class="submenu-aim sublevel selected current current-leaf"><li class="submenu"><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/paranal-observatory/vlt/vlt-instr/"> VLT Instruments <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-252" class="submenu-aim sublevel"><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/paranal-observatory/vlt/vlt-instr/4lgsf/"> 4LGSF </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/paranal-observatory/vlt/vlt-instr/crires/"> CRIRES </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/paranal-observatory/vlt/vlt-instr/crires+/"> CRIRES+ </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/paranal-observatory/vlt/vlt-instr/espresso/"> ESPRESSO </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/paranal-observatory/vlt/vlt-instr/eris/"> ERIS </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/paranal-observatory/vlt/vlt-instr/flames/"> FLAMES </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/paranal-observatory/vlt/vlt-instr/fors/"> FORS1 and FORS2 </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/paranal-observatory/vlt/vlt-instr/hawk-i/"> HAWK-I </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/paranal-observatory/vlt/vlt-instr/isaac/"> ISAAC </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/paranal-observatory/vlt/vlt-instr/kmos/"> KMOS </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/paranal-observatory/vlt/vlt-instr/mad/"> MAD </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/paranal-observatory/vlt/vlt-instr/moons/"> MOONS </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/paranal-observatory/vlt/vlt-instr/muse/"> MUSE </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/paranal-observatory/vlt/vlt-instr/naco/"> NACO </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/paranal-observatory/vlt/vlt-instr/sinfoni/"> SINFONI </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/paranal-observatory/vlt/vlt-instr/sphere/"> SPHERE </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/paranal-observatory/vlt/vlt-instr/uves/"> UVES </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/paranal-observatory/vlt/vlt-instr/vimos/"> VIMOS </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/paranal-observatory/vlt/vlt-instr/visir/"> VISIR </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/paranal-observatory/vlt/vlt-instr/x-shooter/"> X-shooter </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/paranal-observatory/vlt/vlt-instr/vtl-test-cameras/"> VLT Test Cameras </a></li></ul></li><li class="submenu"><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/paranal-observatory/vlt/vlt-names/"> VLT Unit Telescopes Names <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-274" class="submenu-aim sublevel"><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/paranal-observatory/vlt/vlt-names/antu/"> Antu </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/paranal-observatory/vlt/vlt-names/kueyen/"> Kueyen </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/paranal-observatory/vlt/vlt-names/melipal/"> Melipal </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/paranal-observatory/vlt/vlt-names/yepun/"> Yepun </a></li></ul></li><li class="submenu current current-leaf"><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/paranal-observatory/vlt/vlti/"> VLT Interferometer <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-279" class="submenu-aim sublevel selected"><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/paranal-observatory/vlt/vlt-instr/gravity/"> GRAVITY </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/paranal-observatory/vlt/vlt-instr/matisse/"> MATISSE </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/paranal-observatory/vlt/vlt-instr/naomi/"> NAOMI </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/paranal-observatory/vlt/vlt-instr/pionier/"> PIONIER </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/paranal-observatory/vlt/vlt-instr/amber/"> AMBER </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/paranal-observatory/vlt/vlt-instr/midi/"> MIDI </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/paranal-observatory/vlt/vlt-instr/vinci/"> VINCI </a></li></ul></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/paranal-observatory/vlt/auxiliarytelescopes/"> Auxiliary Telescopes </a></li></ul></li><li class="submenu"><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/paranal-observatory/surveytelescopes/"> Survey Telescopes <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-288" class="submenu-aim sublevel"><li class="submenu"><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/paranal-observatory/surveytelescopes/vista/"> VISTA <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-289" class="submenu-aim sublevel"><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/paranal-observatory/surveytelescopes/vista/mirror/"> The VISTA mirror </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/paranal-observatory/surveytelescopes/vista/camera/"> VIRCAM </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/paranal-observatory/surveytelescopes/vista/4most/"> 4MOST </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/paranal-observatory/surveytelescopes/vista/surveys/"> The VISTA surveys </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/paranal-observatory/surveytelescopes/vista/consortium/"> The VISTA consortium </a></li></ul></li><li class="submenu"><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/paranal-observatory/surveytelescopes/vst/"> VST <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-295" class="submenu-aim sublevel"><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/paranal-observatory/surveytelescopes/vst/mirror/"> The VST mirrors </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/paranal-observatory/surveytelescopes/vst/camera/"> OmegaCAM </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/paranal-observatory/surveytelescopes/vst/surveys/"> The VST surveys </a></li></ul></li></ul></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/paranal-observatory/speculoos/"> SPECULOOS </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/paranal-observatory/ngts/"> NGTS </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/paranal-observatory/cta/"> Cherenkov Telescope Array </a></li></ul></li><li class="submenu"><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/lasilla/"> La Silla Observatory <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-302" class="submenu-aim sublevel"><li class="submenu"><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/lasilla/swedish/"> Swedish–ESO Submillimetre Telescope <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-303" class="submenu-aim sublevel"><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/lasilla/swedish/simba/"> SIMBA </a></li></ul></li><li class="submenu"><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/lasilla/ntt/"> New Technology Telescope <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-305" class="submenu-aim sublevel"><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/lasilla/ntt/efosc2/"> EFOSC2 </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/lasilla/ntt/emmi/"> EMMI </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/lasilla/ntt/irspec/"> IRSPEC </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/lasilla/ntt/sofi/"> SOFI </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/lasilla/ntt/soxs/"> SOXS </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/lasilla/ntt/susi2/"> SUSI and SUSI2 </a></li></ul></li><li class="submenu"><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/lasilla/36/"> ESO 3.6-metre telescope <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-312" class="submenu-aim sublevel"><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/lasilla/36/adonis/"> ADONIS </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/lasilla/36/caspec/"> CASPEC </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/lasilla/36/irspec/"> IRSPEC </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/lasilla/36/harps/"> HARPS </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/lasilla/36/mefos/"> MEFOS </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/lasilla/36/nirps/"> NIRPS </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/lasilla/36/optopus/"> OPTOPUS </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/lasilla/36/timmi2/"> TIMMI/2 </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/lasilla/36/36-infrared-photometer-spectrophotometer/"> Infrared Photometer/Spectrophotometer </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/lasilla/36/36-standard-photometer/"> Standard Photometer </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/lasilla/36/infrared-specklegraph/"> Infrared Specklegraph </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/lasilla/36/infrared-speckle-interferometer/"> Infrared Speckle Interferometer </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/lasilla/36/efosc/"> EFOSC </a></li></ul></li><li class="submenu"><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/lasilla/mpg22/"> MPG/ESO 2.2-metre telescope <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-326" class="submenu-aim sublevel"><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/lasilla/mpg22/feros/"> FEROS </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/lasilla/mpg22/grond/"> GROND </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/lasilla/mpg22/irac2/"> IRAC & IRAC2 </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/lasilla/mpg22/pisco/"> PISCO </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/lasilla/mpg22/wfi/"> WFI </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/lasilla/mpg22/infrared-photometer-spectrophotometer/"> Infrared Photometer/Spectrophotometer </a></li></ul></li><li class="submenu"><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/lasilla/swiss/"> Swiss 1.2-metre Leonhard Euler Telescope <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-333" class="submenu-aim sublevel"><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/lasilla/swiss/coralie/"> CORALIE </a></li></ul></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/lasilla/rem/"> Rapid Eye Mount telescope </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/lasilla/trappist/"> TRAnsiting Planets and PlanetesImals Small Telescope–South </a></li><li class="submenu"><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/lasilla/danish154/"> Danish 1.54-metre telescope <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-337" class="submenu-aim sublevel"><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/lasilla/danish154/coravel/"> CORAVEL </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/lasilla/danish154/dfosc/"> DFOSC </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/lasilla/danish154/ccd/"> CCD camera </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/lasilla/danish154/hb-photometer/"> Hβ Photometer </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/lasilla/danish154/two-channel-photometer/"> Two-Channel Photometer </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/lasilla/danish154/four-channel-photometer/"> Four-Channel Photometer </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/lasilla/danish154/six-channel-photometer/"> Six-Channel uvby-Hβ Photometer </a></li></ul></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/lasilla/tarot/"> Télescope à Action Rapide pour les Objets Transitoires </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/lasilla/1mschmidt/"> ESO 1-metre Schmidt telescope </a></li><li class="submenu"><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/lasilla/152metre/"> ESO 1.52-metre telescope <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-347" class="submenu-aim sublevel"><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/lasilla/152metre/bandc/"> Boller and Chivens Spectrograph </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/lasilla/152metre/coude/"> Coudé Spectrograph </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/lasilla/152metre/echelec/"> ECHELEC </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/lasilla/152metre/rv-cass-spectrograph/"> RV Cass Spectrograph </a></li></ul></li><li class="submenu"><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/lasilla/1metre/"> ESO 1-metre telescope <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-352" class="submenu-aim sublevel"><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/lasilla/1metre/fideos/"> FIDEOS </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/lasilla/1metre/infrared-photometer/"> Infrared Photometer </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/lasilla/1metre/single-channel-photometer/"> Single-Channel Photometer </a></li></ul></li><li class="submenu"><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/lasilla/05metre/"> ESO 0.5-metre telescope <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-356" class="submenu-aim sublevel"><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/lasilla/05metre/single-channel-photometer/"> Single-Channel Photometer </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/lasilla/05metre/double-channel-photometer/"> Double-Channel Photometer </a></li></ul></li><li class="submenu"><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/lasilla/coude/"> Coudé Auxiliary Telescope <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-359" class="submenu-aim sublevel"><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/lasilla/coude/ces/"> CES </a></li></ul></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/lasilla/marly/"> MarLy 1-metre telescope </a></li><li class="submenu"><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/lasilla/09metre/"> Dutch 0.9-metre telescope <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-362" class="submenu-aim sublevel"><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/lasilla/09metre/walraven/"> Walraven Photometer </a></li></ul></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/lasilla/t70/"> Swiss T70 telescope </a></li><li class="submenu"><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/lasilla/bochum/"> Bochum 0.61-metre telescope <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-365" class="submenu-aim sublevel"><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/lasilla/bochum/bochum-scanner/"> Bochum Scanner </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/lasilla/bochum/bochum-photometer/"> Bochum Photometer </a></li></ul></li><li class="submenu"><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/lasilla/danish05/"> Danish 0.5-metre telescope <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-368" class="submenu-aim sublevel"><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/lasilla/danish05/danish-two-channel-hb-photometer/"> Two-Channel Hβ Photometer </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/lasilla/danish05/danish-four-channel-uvby-photometer/"> Four-Channel uvby Photometer </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/lasilla/danish05/danish-six-channel-uvby-hb-photometer/"> Six-Channel uvby–Hβ Photometer </a></li></ul></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/lasilla/gpo/"> Grand Prisme Objectif telescope </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/lasilla/swiss04/"> Swiss 0.4-metre telescope </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/lasilla/marseille/"> Marseille 0.36-metre telescope </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/lasilla/grb/"> GRB Monitoring System </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/lasilla/mascara/"> MASCARA </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/lasilla/blackgem/"> BlackGEM </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/lasilla/extra/"> ExTrA </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/lasilla/test-bed/"> Test-Bed Telescope </a></li></ul></li><li class="submenu"><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/apex/"> APEX <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-380" class="submenu-aim sublevel"><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/apex/apex-2a/"> APEX–2A </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/apex/artemis/"> ArTéMiS </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/apex/aszca/"> ASZCa </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/apex/champ-plus/"> CHAMP+ </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/apex/concerto/"> CONCERTO </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/apex/flash/"> FLASH </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/apex/flash-plus/"> FLASH+ </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/apex/laboca/"> LABOCA </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/apex/mpi_11thz/"> MPI_1.1THz </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/apex/p-artemis/"> P-ArTéMiS </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/apex/pi230/"> PI230 </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/apex/polka/"> PolKa </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/apex/saboca/"> SABOCA </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/apex/sepia/"> SEPIA </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/apex/shefi/"> SHeFI </a></li></ul></li><li class="submenu"><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/alma/"> ALMA <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-396" class="submenu-aim sublevel"><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/alma/antennas/"> Antennas </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/alma/transporters/"> Transporters </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/alma/interferometry/"> Interferometry </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/alma/receiver-bands/"> Receiver Bands </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/alma/residencia/"> ALMA Residencia </a></li></ul></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/elt/"> ELT </a></li><li class="submenu"><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/technology/"> Technology for Telescopes <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-403" class="submenu-aim sublevel"><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/technology/active_optics/"> Active Optics </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/technology/adaptive_optics/"> Adaptive Optics </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/technology/ifu/"> Integral Field Units </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/technology/interferometry/"> Interferometry </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/technology/spectroscopy/"> Spectroscopy </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/technology/polarimetry/"> Polarimetry </a></li></ul></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/teles-instr/instruments/"> Instruments </a></li> </ul> </div> </div> </li> <li><a href="/web/20220310081311/https://www.eso.org/public/science/">Discoveries<span class="fa fa-angle-down level0-children-arrows"></span></a> <span class="mobile-children"> <span class="fa fa-angle-down"></span> </span> <div class="level1-wrapper"> <div class="level1"> <ul id="submenu-aim-411" class="submenu-aim"> <li class=""><a href="/web/20220310081311/https://www.eso.org/public/science/top10/"> ESO Top 10 Astronomical Discoveries </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/science/exoplanets/"> Exoplanets </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/science/gravitationalwaves/"> Gravitational Wave Sources </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/science/gc/"> Black Hole at the Centre of our Galaxy </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/science/grb/"> Gamma-Ray Bursts </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/science/archive/"> Science Archive </a></li> </ul> </div> </div> </li> <li><a href="/web/20220310081311/https://www.eso.org/public/events/">Events<span class="fa fa-angle-down level0-children-arrows"></span></a> <span class="mobile-children"> <span class="fa fa-angle-down"></span> </span> <div class="level1-wrapper"> <div class="level1"> <ul id="submenu-aim-418" class="submenu-aim"> <li class=""><a href="/web/20220310081311/https://www.eso.org/public/events/press-evt/"> Press Events </a></li><li class="submenu"><a href="/web/20220310081311/https://www.eso.org/public/events/special-evt/"> Special Events <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-420" class="submenu-aim sublevel"><li class=""><a href="/web/20220310081311/https://www.eso.org/public/announcements/ann18065/"> Open House Day 2018 </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/events/special-evt/openhouse17/"> Open House Day 2017 </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/announcements/ann16071/"> Open House Day 2016 </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/announcements/?search=%23MeetESO"> #MeetESO </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/events/special-evt/openhouse15/"> Long Night of Science 2015 </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/events/special-evt/astronet2014/"> ASTRONET 2014 </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/events/special-evt/openhouse14/"> Open House Day 2014 </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/events/special-evt/eeltblast/"> ELT Groundbreaking </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/events/special-evt/cafe-and-kosmos/"> Café & Kosmos in Munich </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/events/special-evt/openhouse13/"> Open House Day 2013 </a></li><li class="submenu"><a href="/web/20220310081311/https://www.eso.org/public/events/special-evt/astronet2013/"> ASTRONET 2013 <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-431" class="submenu-aim sublevel"><li class=""><a href="/web/20220310081311/https://www.eso.org/public/events/special-evt/astronet2013/dates/"> Important Dates </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/events/special-evt/astronet2013/registration/"> Registration, Fees and Payment </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/events/special-evt/astronet2013/abstracts/"> Abstract Submission </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/events/special-evt/astronet2013/venue/"> Workshop Venue </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/events/special-evt/astronet2013/practical_information/"> Practical Information </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/events/special-evt/astronet2013/accommodation/"> Accommodation </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/events/special-evt/astronet2013/organisers_partners/"> Organisers & Partners </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/events/special-evt/astronet2013/contact/"> Contact </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/events/special-evt/astronet2013/schedule/"> Schedule </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/events/special-evt/astronet2013/participants/"> Participants </a></li></ul></li><li class="submenu"><a href="/web/20220310081311/https://www.eso.org/public/events/special-evt/50years/"> ESO 50 Years <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-442" class="submenu-aim sublevel"><li class=""><a href="/web/20220310081311/https://www.eso.org/public/events/special-evt/50years/message/"> Message from the DG </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/events/special-evt/50years/50highlights50years/"> Fifty Highlights </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/events/special-evt/50years/competitions/"> Competitions </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/events/special-evt/50years/twitter/"> Twitter Feed </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/events/special-evt/50years/webcast/"> Webcast </a></li><li class="submenu"><a href="/web/20220310081311/https://www.eso.org/public/events/special-evt/50years/europetothestars/"> Europe to the Stars <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-448" class="submenu-aim sublevel"><li class=""><a href="/web/20220310081311/https://www.eso.org/public/events/special-evt/50years/europetothestars/news/"> News </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/events/special-evt/50years/europetothestars/movie/"> Movie </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/events/special-evt/50years/europetothestars/book/"> Book </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/events/special-evt/50years/europetothestars/reviews/"> Reviews </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/events/special-evt/50years/europetothestars/bios/"> Bios </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/events/special-evt/50years/europetothestars/offers/"> Purchase Offers </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/events/special-evt/50years/europetothestars/press/"> For the Press </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/events/special-evt/50years/europetothestars/contact/"> Contact Us </a></li></ul></li></ul></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/events/special-evt/50years-in-chile/"> 50 years of ESO in Chile </a></li><li class="submenu"><a href="/web/20220310081311/https://www.eso.org/public/events/special-evt/awesome-universe/"> Awesome Universe <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-458" class="submenu-aim sublevel"><li class=""><a href="/web/20220310081311/https://www.eso.org/public/events/special-evt/awesome-universe/venues/"> List of venues </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/events/special-evt/awesome-universe/organisers/"> For Exhibitors </a></li></ul></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/events/special-evt/100ha/"> 100 Hours of Astronomy </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/events/special-evt/theeye/"> The Eye 3D </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/events/special-evt/imax-hidden-universe/"> IMAX® 3D Film Hidden Universe </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/events/special-evt/openhouse11/"> Open House Day 2011 </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/events/special-evt/openhouse09/"> Open House Day 2009 (German) </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/outreach/bond/"> Bond at Paranal </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/events/special-evt/openhouse/"> Open House Day 2006 </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/events/special-evt/eso40years/"> ESO 40 Years (1962 - 2002) </a></li></ul></li><li class="submenu"><a href="/web/20220310081311/https://www.eso.org/public/events/exhibitions/"> Exhibitions <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-469" class="submenu-aim sublevel"><li class=""><a href="/web/20220310081311/https://www.eso.org/public/events/exhibitions/perma_exhibitions/"> ESO Permanent Exhibitions </a></li><li class=""><a href="https://web.archive.org/web/20220310081311/http://www.esof.eu/"> EuroScience Open Forum (ESOF) </a></li><li class=""><a href="https://web.archive.org/web/20220310081311/http://eas.unige.ch/EWASS2016/"> EWASS 2016 </a></li><li class=""><a href="https://web.archive.org/web/20220310081311/https://aas.org/meetings/aas227"> AAS Winter 2016 </a></li></ul></li><li class="submenu"><a href="/web/20220310081311/https://www.eso.org/public/events/astro-evt/"> Astronomical Events <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-474" class="submenu-aim sublevel"><li class=""><a href="/web/20220310081311/https://www.eso.org/public/events/astro-evt/solareclipse2019/"> Total Solar Eclipse 2019 </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/events/astro-evt/mcnaught2007/"> The Comet McNaught 2007 </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/events/astro-evt/deepimpact/"> Deep Impact - 04.07.2005 </a></li><li class=""><a href="https://web.archive.org/web/20220310081311/http://www.vt-2004.org/"> The Venus Transit - 08.11.2004 </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/events/astro-evt/leonids99/"> The Leonids - 17.11.1999 </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/events/astro-evt/eclipse99/"> Solar Eclipse at ESO HQ - 11.08.1999 </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/events/astro-evt/leonids98/"> The Leonids - 11.1998 </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/events/astro-evt/pathfinder/"> Mars Pathfinder - 1997 </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/events/astro-evt/hyakutake/"> Comet Hyakutake - 1997 </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/events/astro-evt/sl9/"> SL-9 and Jupiter - 1994 </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/events/astro-evt/hale-bopp/"> Comet Hale Bopp - 1994 </a></li></ul></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/events/seminars/"> Astronomy Communication Seminars </a></li> </ul> </div> </div> </li> <li><a href="/web/20220310081311/https://www.eso.org/public/outreach/">Outreach<span class="fa fa-angle-down level0-children-arrows"></span></a> <span class="mobile-children"> <span class="fa fa-angle-down"></span> </span> <div class="level1-wrapper"> <div class="level1"> <ul id="submenu-aim-487" class="submenu-aim"> <li class="submenu"><a href="/web/20220310081311/https://www.eso.org/public/outreach/eduoff/"> Education <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-488" class="submenu-aim sublevel"><li class=""><a href="/web/20220310081311/https://www.eso.org/public/products/education/"> Educational Material </a></li><li class=""><a href="https://web.archive.org/web/20220310081311/http://www.scienceinschool.org/" target="_blank"> Science in School </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/outreach/eduoff/teacherschools/"> Teacher Schools </a></li><li class="submenu"><a href="/web/20220310081311/https://www.eso.org/public/outreach/eduoff/prev-programmes/"> Previous Programmes <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-492" class="submenu-aim sublevel"><li class=""><a href="https://web.archive.org/web/20220310081311/https://www.eso.org/public/outreach/eduoff/prev-programmes/catch-a-star/"> Catch a Star </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/outreach/eduoff/liu/"> Life in the Universe </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/outreach/eduoff/pos/"> Physics On Stage </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/outreach/eduoff/seaspace/docs/"> Sea & Space </a></li></ul></li><li class=""><a href="https://web.archive.org/web/20220310081311/http://kids.alma.cl/?lang=en"> ALMA Kids </a></li></ul></li><li class="submenu"><a href="/web/20220310081311/https://www.eso.org/public/outreach/partnerships/"> Partnerships <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-498" class="submenu-aim sublevel"><li class=""><a href="/web/20220310081311/https://www.eso.org/public/outreach/partnerships/translators/"> Volunteer Translators </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/outreach/partnerships/eson/"> ESO Science Outreach Network </a></li><li class="submenu"><a href="/web/20220310081311/https://www.eso.org/public/outreach/partnerships/chile/"> Collaborations in Chile <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-501" class="submenu-aim sublevel"><li class=""><a href="/web/20220310081311/https://www.eso.org/public/outreach/partnerships/chile/2010/"> 2010 </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/outreach/partnerships/chile/2009/"> 2009 </a></li></ul></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/outreach/partnerships/eso-ambassadors/"> ESO Outreach Ambassadors </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/outreach/partnerships/organisations/"> ESO Outreach Partner Organisations </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/outreach/partnerships/educators/"> Informal Educators </a></li><li class=""><a href="https://web.archive.org/web/20220310081311/http://eso.us2.list-manage1.com/subscribe?u=c35dd77ef962de779092c970b&id=bd58d6ae8d"> Outreach Newsletter Form </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/outreach/partnerships/photo-ambassadors/"> ESO Photo Ambassadors </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/outreach/partnerships/music-ambassadors/"> ESO Music Ambassadors </a></li></ul></li><li class=""><a href="https://web.archive.org/web/20220310081311/https://www.eso.org/public/outreach/first-picture-of-a-black-hole/blog/"> Taking the First Picture of a Black Hole </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/outreach/communication-resources/"> Astronomy Communication Resources </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/outreach/gems/"> Cosmic Gems </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/outreach/social/"> Social Media </a></li><li class="submenu"><a href="/web/20220310081311/https://www.eso.org/public/outreach/ultra-high-definition/"> Ultra HD Expedition <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-514" class="submenu-aim sublevel"><li class=""><a href="/web/20220310081311/https://www.eso.org/public/outreach/ultra-high-definition/team/"> Meet our Heroes </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/outreach/ultra-high-definition/journey/"> Journey Schedule </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/outreach/ultra-high-definition/equipment/"> Equipment </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/outreach/ultra-high-definition/technology-partners/"> Technology Partners </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/outreach/ultra-high-definition/blog/"> Blog </a></li></ul></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/outreach/for_planetariums/"> For Planetariums </a></li><li class=""><a href="https://web.archive.org/web/20220310081311/http://www.eso.org/public/outreach/webcams/"> Webcams </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/outreach/your_eso_pictures/"> Your ESO Pictures </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/outreach/astroprize/"> European Astronomy Journalism Prize </a></li><li class="submenu"><a href="/web/20220310081311/https://www.eso.org/public/outreach/hiddentreasures/"> Hidden Treasures <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-524" class="submenu-aim sublevel"><li class=""><a href="/web/20220310081311/https://www.eso.org/public/outreach/hiddentreasures/rules/"> Hidden Treasures Rules </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/outreach/hiddentreasures/instructions/"> Hidden Treasures Instructions </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/outreach/hiddentreasures/science_archive/"> Hidden Treasures Form </a></li><li class=""><a href="https://web.archive.org/web/20220310081311/http://www.flickr.com/groups/esohiddentreasures/"> Flickr Upload </a></li></ul></li><li class="submenu"><a href="/web/20220310081311/https://www.eso.org/public/outreach/department/"> Our Team <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-529" class="submenu-aim sublevel"><li class=""><a href="/web/20220310081311/https://www.eso.org/public/outreach/department/students/"> Students and Visitors </a></li><li class=""><a href="https://web.archive.org/web/20220310081311/http://supernova.eso.org/join-us/"> Join us </a></li></ul></li><li class=""><a href="https://web.archive.org/web/20220310081311/http://supernova.eso.org/"> ESO Supernova </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/outreach/art/"> Art at ESO </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/outreach/data2dome/"> Data2Dome </a></li><li class=""><a href="https://web.archive.org/web/20220310081311/https://www.eso.org/public/blog/"> ESOblog </a></li> </ul> </div> </div> </li> <li><a href="/web/20220310081311/https://www.eso.org/public/products/">Products<span class="fa fa-angle-down level0-children-arrows"></span></a> <span class="mobile-children"> <span class="fa fa-angle-down"></span> </span> <div class="level1-wrapper"> <div class="level1"> <ul id="submenu-aim-536" class="submenu-aim"> <li class="submenu"><a class="no-link children" href="#"> Audiovisual and multimedia <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-537" class="submenu-aim sublevel"><li class=""><a href="/web/20220310081311/https://www.eso.org/public/products/models3d/"> 3D models </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/products/applications/"> Apps </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/products/media/"> DVDs and CDs </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/products/imaxfilms/"> IMAX movies </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/products/minisites/"> Mini-sites </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/products/music/"> Music </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/products/planetariumshows/"> Planetarium shows </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/products/presentations/"> Presentations </a></li><li class=""><a href="https://web.archive.org/web/20220310081311/https://www.eso.org/public/products/virtualbackgrounds/"> Virtual Backgrounds </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/products/virtualtours/"> Virtual Tours </a></li></ul></li><li class="submenu"><a class="no-link children" href="#"> Periodicals <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-548" class="submenu-aim sublevel"><li class=""><a href="/web/20220310081311/https://www.eso.org/public/products/messengers/"> Messenger </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/products/capjournals/"> CAPjournal </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/products/schools/"> Science in School </a></li></ul></li><li class="submenu"><a class="no-link children" href="#"> Print products <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-552" class="submenu-aim sublevel"><li class=""><a href="/web/20220310081311/https://www.eso.org/public/products/annualreports/"> Annual Reports </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/products/books/"> Books </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/products/brochures/"> Brochures </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/products/bulletins/"> Bulletins </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/products/calendars/"> Calendars </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/products/conf_posters/"> Conference posters </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/products/flyers/"> Flyers </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/products/handouts/"> Handouts </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/products/maps/"> Maps </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/products/presskits/"> Press kits </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/products/reports/"> Reports </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/products/postcards/"> Postcards </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/products/stickers/"> Stickers </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/products/print_posters/"> Printed posters </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/products/papermodels/"> Paper models </a></li></ul></li><li class="submenu"><a href="/web/20220310081311/https://www.eso.org/public/products/merchandise/"> Merchandise <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-568" class="submenu-aim sublevel"><li class=""><a href="/web/20220310081311/https://www.eso.org/public/products/merchandise/"> Merchandise </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/products/apparel/"> Apparel </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/products/mountedimages/"> Mounted images </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/products/stationery/"> Stationery </a></li></ul></li><li class="submenu"><a class="no-link children" href="#"> Electronic products <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-573" class="submenu-aim sublevel"><li class=""><a href="/web/20220310081311/https://www.eso.org/public/products/electroniccards/"> Electronic cards </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/products/elec_posters/"> Electronic posters </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/products/epublications/"> ePublications </a></li><li class=""><a href="https://web.archive.org/web/20220310081311/https://www.eso.org/public/products/virtualbackgrounds/"> Virtual Backgrounds </a></li></ul></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/products/education/"> Educational material </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/products/exhibitions/"> Exhibition material </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/products/logos/"> Logos </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/shop/"> Order in ESOshop </a></li> </ul> </div> </div> </li> <li><a href="/web/20220310081311/https://www.eso.org/public/industry/">Business@ESO<span class="fa fa-angle-down level0-children-arrows"></span></a> <span class="mobile-children"> <span class="fa fa-angle-down"></span> </span> <div class="level1-wrapper"> <div class="level1"> <ul id="submenu-aim-582" class="submenu-aim"> <li class=""><a href="/web/20220310081311/https://www.eso.org/public/industry/cp.html"> Procurement at ESO </a></li><li class=""><a href="https://web.archive.org/web/20220310081311/http://www.eso.org/public/industry/events/"> Industry Events </a></li><li class="submenu"><a href="/web/20220310081311/https://www.eso.org/public/industry/techtrans/"> Technology Transfer <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-585" class="submenu-aim sublevel"><li class=""><a href="/web/20220310081311/https://www.eso.org/public/industry/techtrans/technology-developed-by-industry-or-institutes/"> Technology Developed by Industries </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/industry/techtrans/develeso/"> Novel technologies by ESO </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/industry/techtrans/developments/"> ESO know-how </a></li></ul></li><li class="submenu"><a href="/web/20220310081311/https://www.eso.org/public/industry/projects/"> Future Projects <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-589" class="submenu-aim sublevel"><li class=""><a href="/web/20220310081311/https://www.eso.org/public/industry/projects/elt/"> Working with the ELT </a></li></ul></li><li class="submenu"><a href="/web/20220310081311/https://www.eso.org/public/industry/safety.html"> Safety <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-591" class="submenu-aim sublevel"><li class=""><a href="/web/20220310081311/https://www.eso.org/public/industry/safety/emergency.html"> Emergency & Evacuation </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/industry/safety/traffic.html"> Traffic & Parking at ESO </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/industry/safety/contractors.html"> Contractors at ESO </a></li></ul></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/industry/contact/"> Contact Information </a></li> </ul> </div> </div> </li> <li><a href="https://web.archive.org/web/20220310081311/https://recruitment.eso.org/">Career Opportunities<span class="fa fa-angle-down level0-children-arrows"></span></a> <span class="mobile-children"> <span class="fa fa-angle-down"></span> </span> <div class="level1-wrapper"> <div class="level1"> <ul id="submenu-aim-596" class="submenu-aim"> <li class=""><a href="https://web.archive.org/web/20220310081311/https://recruitment.eso.org/"> Recruitment </a></li><li class="submenu"><a href="/web/20220310081311/https://www.eso.org/public/jobs/conditions/"> Employment Conditions <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-598" class="submenu-aim sublevel"><li class=""><a href="/web/20220310081311/https://www.eso.org/public/jobs/conditions/intstaff/"> International Staff Members </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/jobs/conditions/localstaff/"> Local Staff Members (Spanish / English) </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/jobs/conditions/fellows/"> Fellows </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/jobs/conditions/students/"> Students </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/jobs/conditions/paidassoc/"> Paid Associates </a></li></ul></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/jobs/working-at-eso/"> Working at ESO </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/jobs/other-information/"> Other Information </a></li><li class=""><a href="/web/20220310081311/https://www.eso.org/public/jobs/how_to_use/"> How to use this site </a></li> </ul> </div> </div> </li> </ul> </div> </nav> <div id="content" class=""> <div id="eso-side-logo"> <a href="/web/20220310081311/https://www.eso.org/public/"> <div data-spy="affix" class="affix"> <div class="sprites-esologo"></div> <span>European<br>Southern<br>Observatory</span> </div> </a> </div> <div class="container " id="body"> <div class="row no-page"> <div class="col-md-12"> </div> </div> <div class="row page"> <div class="col-md-12 one-column"> <div id="edit-info-block"> <div id="page-edit-success" class="alert alert-success alert-dismissible" role="alert" style="display: none"> <button type="button" class="close" data-dismiss="alert" aria-label="Close"><span aria-hidden="true">×</span></button> Page saved successfully </div> <div id="page-edit-failure" class="alert alert-danger alert-dismissible" role="alert" style="display: none"> <button type="button" class="close" data-dismiss="alert" aria-label="Close"><span aria-hidden="true">×</span></button> Couldn't save page :( Please try again. </div> </div> <div class="page-content"> <div id="editable-content"> <div class="title section"> <h1>VLTI</h1> <h2>The Very Large Telescope Interferometer</h2> <p><a href="/web/20220310081311/https://www.eso.org/public/images/dauv_hude_aerial5/"><img src="/web/20220310081311im_/https://www.eso.org/public/archives/static/teles-instr/vlt/images/dauv_hude_aerial5.jpg" alt=""></a></p> <div class="row"> <div class="col-md-8"> <p>ESO’s Very Large Telescope Interferometer (VLTI) uses <a href="https://web.archive.org/web/20220310081311/https://www.eso.org/public/teles-instr/technology/interferometry/?lang">interferometry</a> to combine the light collected by the four VLT 8.2-metre Unit Telescopes (UT) or the four movable 1.8-metre Auxiliary Telescopes (ATs). This creates a larger “virtual” telescope with a diameter equivalent to the distance between the individual telescopes (called “baseline”), allowing the VLTI to pick up much finer details of the cosmos than would be possible with the ATs or the UTs alone.</p> <p>The possibility to combine light using either the UTs or the ATs makes the VLTI particularly special. The UTs, with their larger diameters, have powerful light collecting ability and can form six baselines, all with different lengths and orientations. This yields a maximum possible resolution equivalent to a telescope 130 metres in diameter. The ATs can be moved to 30 different locations along the VLT platform to obtain more information about the observed cosmic objects. This provides a much larger number of possible baselines and enables the VLTI to achieve a maximum possible resolution equivalent to a telescope of 200 metres in diameter.</p> <p>At present, the VLTI is operated with baselines of up to 140 metres, depending on the position of the ATs. Thanks to this large diameter, astronomers can see details up to about 17 times finer than with a single UT, a sharpness equivalent to distinguishing the front and rear lights of a car, as viewed on its side, parked on the Moon.</p> <p>The light beams collected by the individual telescopes are brought together in the VLTI using a complex system of mirrors in underground tunnels. These guide the beams towards an impressive suite of VLTI instruments, where they are combined and are finally ready for scientific analysis. To successfully combine the light, the beam’s path difference from each telescope must be kept within a precision of one thousandth of a millimetre. </p> <h2>Science with the VLTI</h2> <p>Thanks to its exquisite sharpness, the VLTI can image a wide range of objects in unprecedented detail, shedding new light on many research fields in astronomy. Examples include the search for planets outside the Solar System, the observation of both young and old stars, the study of the immediate surroundings of the supermassive black hole at the centre of the Milky Way, and the investigation of cosmic objects far away from our galaxy such as active galactic nuclei, one of the most energetic and mysterious phenomena in the Universe.</p> <p>Some of the VLTI’s most outstanding results include:</p> <ul><li><a href="https://web.archive.org/web/20220310081311/https://www.eso.org/public/news/eso2017/">2020 Nobel-Prize-winning observations of stars orbiting the supermassive black hole at the centre of the Milky Way</a></li> <li><a href="https://web.archive.org/web/20220310081311/https://www.eso.org/public/news/eso1905/">First direct observation of an exoplanet using optical interferometry</a></li> <li><a href="https://web.archive.org/web/20220310081311/https://www.eso.org/public/news/eso1637/">Highest-resolution image of the Eta Carinae star system</a></li> <li><a href="https://web.archive.org/web/20220310081311/https://www.eso.org/public/news/eso1435/" "="">Detection of exozodiacal light</a></li> <li><a href="https://web.archive.org/web/20220310081311/https://www.eso.org/public/news/eso1726/">Best ever image of a star’s surface and atmosphere</a></li></ul> <h2>Instruments</h2> <p>The following instruments are currently operational at the VLTI, all active at near and mid-infrared wavelengths:</p> <ul><li><a href="https://web.archive.org/web/20220310081311/https://www.eso.org/public/teles-instr/paranal-observatory/vlt/vlt-instr/gravity/">GRAVITY</a></li> <li><a href="https://web.archive.org/web/20220310081311/https://www.eso.org/public/teles-instr/paranal-observatory/vlt/vlt-instr/matisse/">MATISSE</a></li> <li><a href="https://web.archive.org/web/20220310081311/https://www.eso.org/public/teles-instr/paranal-observatory/vlt/vlt-instr/naomi/">NAOMI</a></li> <li><a href="https://web.archive.org/web/20220310081311/https://www.eso.org/public/teles-instr/paranal-observatory/vlt/vlt-instr/pionier/">PIONIER</a></li></ul> <p>The following instruments have been used during the first years of the VLTI and are no longer operational:</p> <ul><li><a href="https://web.archive.org/web/20220310081311/https://www.eso.org/public/teles-instr/paranal-observatory/vlt/vlt-instr/amber/">AMBER</a></li> <li><a href="https://web.archive.org/web/20220310081311/https://www.eso.org/public/teles-instr/paranal-observatory/vlt/vlt-instr/midi/">MIDI</a></li> <li><a href="https://web.archive.org/web/20220310081311/https://www.eso.org/public/news/eso0829/">PRIMA</a></li> <li><a href="https://web.archive.org/web/20220310081311/https://www.eso.org/public/teles-instr/paranal-observatory/vlt/vlt-instr/vinci/">VINCI</a></li></ul> </div> <div class="col-md-4"> <table class="table table-bordered" width="100%"> <tbody> <tr> <td> <h3>Very Large Telescope Interferometer</h3> <table class="table"> <tbody> <tr> <td valign="top" width="60"><strong>Name:</strong></td> <td valign="top">Very Large Telescope Interferometer</td> </tr> <tr> <td valign="top" width="60"><strong>Site:</strong></td> <td valign="top">Cerro Paranal</td> </tr> <tr> <td valign="top" width="60"><strong>Altitude:</strong></td> <td valign="top">2635 m</td> </tr> <tr> <td valign="top"><strong>Type:</strong></td> <td valign="top">Infrared interferometer</td> </tr> <tr> <td valign="top"><strong>First Light date:</strong></td> <td valign="top"><a href="https://web.archive.org/web/20220310081311/https://www.eso.org/public/news/eso0134/?lang">29 October 2001</a> (two UTs combined)</td> </tr> <tr> <td valign="top"><strong>Interferometry: </strong></td> <td valign="top">UTs: maximum 130 m baseline. ATs: maximum 200 m baseline.</td> </tr> <tr> <td valign="top"><strong>Images taken with VLTI:</strong></td> <td valign="top"><a href="https://web.archive.org/web/20220310081311/https://www.eso.org/public/images/archive/search/?&facility=64">Link</a></td> </tr> <tr> <td valign="top"><strong>Images of VLTI:</strong></td> <td valign="top"><a href="https://web.archive.org/web/20220310081311/https://www.eso.org/public/images/archive/category/paranal/list/1/?search=VLTI">Link</a></td> </tr> <tr> <td valign="top"><strong>Videos of VLTI:</strong></td> <td valign="top"><a href="https://web.archive.org/web/20220310081311/https://www.eso.org/public/videos/?search=VLTI">Link</a></td> </tr> <tr> <td valign="top"><strong>Press Releases with VLTI:</strong></td> <td valign="top"><a href="https://web.archive.org/web/20220310081311/https://www.eso.org/public/news/archive/search/?&facility=64">Link</a></td> </tr> </tbody> </table> </td> </tr> </tbody> </table> </div> </div> </div> </div> </div> </div> </div> </div>  <div class="row footernote"> <div class="col-xs-12 col-md-3"> <a href="https://web.archive.org/web/20220310081311/mailto:information@eso.org">Send us your comments!</a> </div> <div class="col-xs-12 col-md-3"> <a href="/web/20220310081311/https://www.eso.org/public/outreach/newsletters/esonews/">Subscribe to receive news from ESO in your language</a> </div> <div class="col-xs-12 col-md-3"> <a href="https://web.archive.org/web/20220310081311/https://www.cdn77.com/">Accelerated by CDN77</a> </div> <div class="col-xs-12 col-md-3"> <a href="/web/20220310081311/https://www.eso.org/public/about-eso/privacy/">Terms & Conditions</a> </div> </div> <link href="/web/20220310081311cs_/https://www.eso.org/public/archives/djp/css/extras.166b25c68b97.css" rel="stylesheet" type="text/css"/> <script type="text/javascript">var MEDIA_URL = "/public/archives/"</script> <script type="text/javascript" src="/web/20220310081311js_/https://www.eso.org/public/archives/djp/js/main.6ae27c5f7b90.js" charset="utf-8"></script> </div>  <div id="social-share" class="hidden-print"> <div class="link facebook" data-toggle="tooltip" data-placement="right" title="Share on Facebook"> <a href="https://web.archive.org/web/20220310081311/https://www.facebook.com/sharer/sharer.php?u=https://www.eso.org/public/teles-instr/paranal-observatory/vlt/vlti/" target="_blank"><i class="fa fa-facebook" aria-hidden="true"></i></a> </div> <div class="link twitter" data-toggle="tooltip" data-placement="right" title="Share on Twitter"> <a href="https://web.archive.org/web/20220310081311/http://twitter.com/intent/tweet?url=https://www.eso.org/public/teles-instr/paranal-observatory/vlt/vlti/&text=VLTI&via=ESO" target="_blank"><i class="fa fa-twitter" aria-hidden="true"></i></a> </div> <div class="link pinterest" data-toggle="tooltip" data-placement="right" title="Share on Pinterest"> <a href="https://web.archive.org/web/20220310081311/http://pinterest.com/pin/create/button/?url=https://www.eso.org/public/teles-instr/paranal-observatory/vlt/vlti/&media=&description=VLTI" target="_blank"><i class="fa fa-pinterest" aria-hidden="true"></i></a> </div> <div class="link print" data-toggle="tooltip" data-placement="right" title="Print"> <a href="javascript:window.print()" target="_blank"><i class="fa fa-print" aria-hidden="true"></i></a> </div> <div class="link email" data-toggle="tooltip" data-placement="right" title="Share by email"> <a href="https://web.archive.org/web/20220310081311/mailto:%20?subject=ESO — VLTI&body=https://www.eso.org/public/teles-instr/paranal-observatory/vlt/vlti/" target="_blank"><i class="fa fa-envelope-o" aria-hidden="true"></i></a> </div> </div> <script> $('[data-toggle="tooltip"]').tooltip(); </script> <input type="hidden" name="csrfmiddlewaretoken" value="WFZQBfTLouxJ17wBvYoYjQteSlEnoiY9WrmUHRyA9oVJDrgYxn27tCQKHQf92OQ4"/> </body> </html>

CINXE.COM

VLTI | ESO